Locate an anchor point
That’s right, all the entry gates are locked, so you’re going to zipline down into the United India Gardens. Target your crossbow scope on the action icon on the gazebo and press the prompted button. Lucan hands over the bolt attached to the rope line and Galahad loads it into his crossbow.
Fire the bolt at the anchor point
Aim at the anchor point on the gazebo again and fire. The bolt attaches to the gazebo; Lucan releases the line weight to pull it taut. Approach the line until the prompt appears then push 
to ride the zipline down.
A Company guard in the gazebo hears your landing (12) and comes over with a lantern to investigate. When he turns away and the flashing prompt appears, time your button-press for when the prompt is highlighted white. Galahad does a silent takedown on the unfortunate fellow.
Acquire the gate key
Upper Garden
Lucan explains that you must get to the lower garden. The garden gate is locked, so you’ll have to find the key. The only way to procure this key, however, is to execute stealth kills on all six of the guards patrolling the upper gardens—the sixth guard you slay drops the key, no matter which guard it is. So you must creep quietly around the garden paths, either shooting guards with your crossbow or executing silent takedowns from behind. Note that you have only five crossbow bolts to start, so you have to make at least one knife kill in this upper garden.
Fortunately, the guards are easy enough to spot from afar, since each one carries a bright lantern. As you move in on each target from behind, be sure to glance around and make sure none of the other guards are shining their lanterns your way. When you kill the sixth guard, he drops the key. Approach it and press to pick it up.
Unlock the gate
The new directive includes an onscreen directive marker. (Remember that the marker fades over time, but reappears if you press 
.) Follow the marker to either of the staircases (13)or(14) that leads down to an enclosed patio.
At the bottom, turn into the alcove to find an ammo crate (15) that refills your crossbow bolts. Then inspect the United Herald newspaper (16). The lead story reports on the power outage in Whitechapel.
Now you can approach the barred metal gate (17) and use the key you found to open it and enter the lower garden.
Lower Garden
Careful! As you exit the garden gate (17), the first guard you encounter passes on the walkway right above you (18), just beyond the railing. Let him pass by to the right, and then nail him with a crossbow bolt. A second guard patrols the area too, moving along this garden’s upper walkway. Once you eliminate both guards, the coast is clear for Lucan to make his move, and you get your next directive.
Rendezvous with Lucan
The directive marker appears onscreen. Follow it to Lucan’s position at the garden wall (19) and approach him until the prompt appears. Press the button indicated to trigger a quick scene. Lucan infiltrates the United India house via the east wing, and sends Galahad to clear the west wing. Then Lucan boosts Galahad over the wall.
Galahad spots a guard entering a door. When control returns, move to the door (20) and use your Stamford Lockpick to pick the doorlock. Open the door and enter the west wing.
Clear the west wing
Just inside the door inspect the photo (21) on the table; it looks like a mother and her two young children. On the back is written “My Dearest Elizabeth.”
Peek out into the hallway to spot a guard near the top of the staircase (22). Watch until he safely faces away from you and then pick him off with your crossbow or do a silent takedown. Head downstairs and move out into the west wing courtyard.
Four more Company guards with lanterns patrol this wing. Stalk each one patiently, and be careful—their patrol patterns overlap in places so that if you attack one, another might spot you. Crossbow fire makes this much easier. Don’t miss the ammo crate (23) under one of the tables up on the dining patio, but watch out for the relentless guard that patrols in a circle around the patio.
Once all four west-wing guards are eliminated, follow the directive marker to the grate-covered tunnel in the pond (24) on the side opposite where you entered. Approach the grate and press to lift it. Follow the tunnel to the opposite grate to trigger an event. Out in the courtyard beyond, Lakshmi incapacitates a guard sitting at a table!
This automatically brings up your crossbow scope. Suddenly, a second guard appears at the right, yelling. Quickly! Shoot the second guard before he shoots Lakshmi!
